Sometimes just having the courage to place bet can be the difference between winning millions, so if you ask God for luck you wouldn't know if its just your mere luck or it is really a spiritual being intervening in your life. Basically some gamblers that thinks God help them win places a higher stakes of gambling, they are willing to take the risk more often thinking that God will create a way for them to win there's no confirming it but trying it wouldn't cost you anything but seconds of time.

By the way Chinese people likes gambling and they have so many rituals and superstition regarding to gambling and luck, even businesses they see it as gambling and places different artifacts such as waving cat and frog with coins under or Buddha sitting on coins, there is a lot of things that Chinese connects on spiritual beings and I believe whether it is really helping or not it's all about the mindset and being certain on when to bet.